Global Patent Index - EP 0464613 A1

EP 0464613 A1 19920108 - Process of drawing optical fiber.

Title (en)

Process of drawing optical fiber.

Title (de)

Verfahren zum Ziehen optischer Fasern.

Title (fr)

Procédé pour l'étirage de fibres optiques.

Publication

EP 0464613 A1 19920108 (EN)

Application

EP 91110508 A 19910625

Priority

JP 16676390 A 19900627

Abstract (en)

There is provided a process of melt drawing an optical fiber (119) from a preform (101) therefor in which a heating furnace (1) comprising a muffle tube (2) inside thereof through which the optical fiber (119) is passed is provided immediately below a melt drawing furnace (105) to further draw the optical fiber (119) while heated, and an interior of the muffle tube (2) is kept in an atmosphere selected from the group consisting of an inert atmosphere, an atmosphere comprising oxygen gas and an atmosphere comprising hydrogen gas. <IMAGE>

IPC 1-7

C03B 37/15

IPC 8 full level

G02B 6/00 (2006.01); C03B 37/027 (2006.01); C03B 37/029 (2006.01)

CPC (source: EP KR US)

C03B 37/02 (2013.01 - KR); C03B 37/02718 (2013.01 - EP US); C03B 37/029 (2013.01 - EP US); C03B 2205/56 (2013.01 - EP US); C03B 2205/63 (2013.01 - EP US); Y02P 40/57 (2015.11 - EP US)

Citation (search report)

  • [X] US 4396409 A 19830802 - BAILEY ALAN C, et al
  • [A] DE 2817651 A1 19791031 - SIEMENS AG
  • [X] PATENT ABSTRACTS OF JAPAN vol. 10, no. 90 (C-337)(2147) 08 April 1986, & JP-A-60 221337 (FUJIKURA DENSEN KK) 6 November 1985,
  • [X] PATENT ABSTRACTS OF JAPAN vol. 12, no. 382 (C-535)(3229) 12 October 1988, & JP-A-63 129035 (FUJIKURA LTD) 1 June 1988,

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 0464613 A1 19920108; EP 0464613 B1 19950830; AU 639791 B2 19930805; AU 7838491 A 19920102; CA 2045349 A1 19911228; CA 2045349 C 19961224; DE 69112513 D1 19951005; DE 69112513 T2 19960307; JP H0459631 A 19920226; KR 920000634 A 19920129; KR 930011999 B1 19931223; US 5320658 A 19940614

DOCDB simple family (application)

EP 91110508 A 19910625; AU 7838491 A 19910614; CA 2045349 A 19910625; DE 69112513 T 19910625; JP 16676390 A 19900627; KR 910010700 A 19910626; US 92199192 A 19920803